Apparent contact angles of liquid water droplet breaking through a gas diffusion layer of polymer electrolyte membrane fuel cell

Yu, Junliang; Lehnert, Werner; Froning, Dieter; Reimer, Uwe

doi:10.1016/j.ijhydene.2018.01.168

Cited by 33 publications

(36 citation statements)

References 72 publications

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“…Bereits in früheren Beiträgen , wurde die Situation an der Oberfläche der GDL analysiert. Die Simulation von Wassertransport durch die GDL wurde am Interface zwischen GDL und Kanal ausgewertet, wo die Wassertropfen aus der GDL austreten.…”

Section: Introductionunclassified

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Statistische Analyse des lokalen Wassertransportes einer Polymer‐Elektrolyt‐Brennstoffzelle

Froning

Reimer

et al. 2019

Chemie Ingenieur Technik

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Der Wassertransport in der Gasdiffusionsschicht (gas diffusion layer, GDL) einer Polymer-Elektrolyt-Brennstoffzelle (PEFC) wurde mithilfe der Lattice-Boltzmann-Methode simuliert. Mit einem stochastischen Geometriemodell wurde ein Ensemble von Mikrostrukturen generiert, die alle stochastisch äquivalent zur realen Struktur einer GDL sind. Die raue Oberfläche der GDL bildet das Interface zwischen GDL und Luftkanal einer PEFC. Die aus der GDL austretenden Wassertropfen wurden hinsichtlich ihrer Kontaktwinkel analysiert und kurz der dynamische Verlauf betrachtet.The water transport in the gas diffusion layer (GDL) of a polymer electrolyte fuel cell (PEFC) was simulated using the Lattice Boltzmann method. By means of a stochastic geometry model an ensemble of microstructures was generated, all of them stochastically equivalent to the real structure of a GDL. The rough surface of the GDL defines the interface between the GDL and air channel of a PEFC. The water droplets emerging from the GDL were analyzed statistically regarding their contact angles. A short insight to the dynamics is given.

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Section: Introductionunclassified

“…Andersson et al simulierten das Verhalten von Wassertropfen im Luftkanal einer PEFC, die aus der GDL austreten. Dabei wurde eine Verteilung der Kontaktwinkel nach Yu et al verwendet.…”

Section: Introductionunclassified

Statistische Analyse des lokalen Wassertransportes einer Polymer‐Elektrolyt‐Brennstoffzelle

Froning

Reimer

et al. 2019

Chemie Ingenieur Technik

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“…droplet breaking through a gas diffusion layer [115] and droplet sliding angle on hydrophobic wire screens [116]. In another category, the publication related to the phenomenon of droplet jumping upon coalescence on a superhydrophobic surface (Type-C) increased rapidly in recent years.…”

Section: Publicationsmentioning

confidence: 99%

“…Among the categories, 'Type-C' simulation had the most extensive range of droplet size. It indicated that the factor of hydrophobicity influenced the phenomenon more than the size of the droplet itself [115].…”

Section: Hydrophobicity and Droplet Sizementioning

confidence: 99%

Computational Modelling of Droplet Dynamics Behaviour in Polymer Electrolyte Membrane Fuel Cells: A Review

Yong

Ganesan

Kazi

et al. 2019

J. Electrochem. Sci. Technol

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Polymer Electrolyte Membrane Fuel Cells (PEMFC) is one of the leading advanced energy conversion technology for the use in transport. It generates water droplets through the catalytic processes and dispenses the water through the gas-flowed microchannels. The droplets in the dispensing microchannel experience g-forces from different directions during the operation in transport. Therefore, this paper reviews the computational modelling topics of droplet dynamics behaviour specifically for three categories, i.e. (i) the droplet sliding down a surface, (ii) the droplet moving in a gas-flowed microchannel, and (iii) the droplet jumping upon coalescence on superhydrophobic surface; in particular for the parameters like hydrophobicity surfaces, droplet sizes, numerical methods, channel sizes, wall conditions, popular references and boundary conditions.

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“…The role of the GDL/channel interface in this scenario is illustrated in Figure 1. The GDL/channel interface was investigated by Yu et al [34], who analyzed irregular contact angles of water droplets at the GDL surface and their pattern when they passed the GDL/channel interface at several positions. The relevance of the interface for multi-scale simulations was shown by Qin et al [35,36] and Aghihi et al [37], who used pore network modeling (PNM) to bridge the scales (still on water transport in low temperature PEFCs).…”

Section: Introductionmentioning

confidence: 99%

Stochastic Analysis of the Gas Flow at the Gas Diffusion Layer/Channel Interface of a High-Temperature Polymer Electrolyte Fuel Cell

Froning

Reimer

et al. 2018

Applied Sciences

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Gas diffusion layers (GDLs) play a significant role in the efficient operation of high-temperature polymer electrolyte fuel cells. They connect the electrodes to the gas channels of the bipolar plate by porous material with a meso-scale geometric structure. The electrodes must be sufficiently supplied by gases from the channels to operate fuel cells efficiently. Furthermore, reaction products must be transported in the other direction. The gas transport is simulated in the through-plane direction of the GDL, and its microstructure created by a stochastic model is equivalent to the structure of real GDL material. Continuum approaches in cell-scale simulations have model parameters for porous regions that can be taken from effective properties calculated from the meso-scale simulation results, as one feature of multi-scale simulations. Another significant issue in multi-scale simulations is the interface between two regions. The focus is on the gas flow at the interface between GDL and the gas channel, which is analyzed using statistical methods. Quantitative relationships between functionality and microstructure can be detected. With this approach, virtual GDL materials can possibly be designed with improved transport properties. The evaluation of the surface flow with stochastic methods offers substantiated benefits that are suitable for connecting the meso-scale to larger spatial scales.

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Apparent contact angles of liquid water droplet breaking through a gas diffusion layer of polymer electrolyte membrane fuel cell

Cited by 33 publications

References 72 publications

Statistische Analyse des lokalen Wassertransportes einer Polymer‐Elektrolyt‐Brennstoffzelle

Statistische Analyse des lokalen Wassertransportes einer Polymer‐Elektrolyt‐Brennstoffzelle

Computational Modelling of Droplet Dynamics Behaviour in Polymer Electrolyte Membrane Fuel Cells: A Review

Stochastic Analysis of the Gas Flow at the Gas Diffusion Layer/Channel Interface of a High-Temperature Polymer Electrolyte Fuel Cell

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